/*
 * Copyright 2009 XueSong Guo.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.webwheel.database.engine;

import cn.webwheel.database.SqlObject;

import java.io.*;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class SqlObjectHandler {

    public static void set(PreparedStatement stmt, int idx, SqlObject obj) throws SQLException, IOException {
        if (obj == null) {
            stmt.setBinaryStream(idx, null, 0);
        } else {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream bos = new ObjectOutputStream(baos);
            bos.writeObject(obj);
            bos.close();
            byte[] bytes = baos.toByteArray();
            stmt.setBinaryStream(idx, new ByteArrayInputStream(bytes),bytes.length);
        }
    }

    public static Object get(ResultSet rs, String idx) throws SQLException, IOException, ClassNotFoundException {
        return get(rs.getBinaryStream(idx));
    }

    public static Object get(ResultSet rs, int idx) throws SQLException, IOException, ClassNotFoundException {
        return get(rs.getBinaryStream(idx));
    }

    public static Object get(InputStream is) throws IOException, ClassNotFoundException {
        if(is==null) return null;
        return new ObjectInputStream(is).readObject();
    }
}
